Therapeutic Targeting of Macrophage PI3Kgamma in HNSCC
HNSCC 中巨噬细胞 PI3Kgamma 的治疗靶向
基本信息
- 批准号:10400695
- 负责人:
- 金额:$ 46.36万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-04-17 至 2023-11-30
- 项目状态:已结题
- 来源:
- 关键词:AftercareBiopsyBiopsy SpecimenBlood specimenCD8-Positive T-LymphocytesCancer EtiologyCarcinogensCellsClinicalCountryDataDendritic CellsDeveloping CountriesDiseaseExcisionFutureGene ExpressionGene Expression ProfileGene Expression ProfilingGeneticGoalsHead and Neck Squamous Cell CarcinomaHuman PapillomavirusImmuneImmune checkpoint inhibitorImmune responseImmunologic MarkersImmunooncologyImmunosuppressionImmunotherapeutic agentImmunotherapyIncidenceInflammationInflammatoryInterleukin-10Interleukin-12InvestigationMalignant NeoplasmsMediatingMemoryMetastatic/RecurrentModelingMolecularMonitorMyeloid CellsNatureNivolumabOperative Surgical ProceduresPIK3CG genePatient-Focused OutcomesPatientsPharmacologyPhenotypePopulationPrognosisProtein IsoformsRecurrent diseaseResectableResistanceRoleSignal TransductionSignaling ProteinT cell therapyT memory cellT-LymphocyteTestingThe Cancer Genome AtlasTherapeuticTobaccoTransforming Growth Factor betaTumor-associated macrophagesUnited Statesadvanced diseaseanti-PD-1anti-tumor immune responsearginasecytotoxiceffector T cellimmune resistanceimprovedimproved outcomein vivoinhibitormacrophagemortalitymouse modelnovelnovel therapeuticsoral HPV-positive head and neck cancerspredicting responsepredictive markerrecruitresponse biomarkertherapeutic targettooltreatment responsetumortumor microenvironment
项目摘要
ABSTRACT
There is a critical need to develop novel therapies for head and neck squamous cell carcinoma (HNSCC). The
incidence of HPV-related HNSCC is rapidly rising in the United States and other countries around the world,
while tobacco-related HNSCC remains an aggressive disease with poor prognosis and limited therapeutic
options. Worldwide, HNSCC accounts for over 600,000 cases annually and is a leading cause of cancer
mortality in developing countries. A majority of HNSCC patients present initially with locally or locoregionally
advanced disease, yet these patients largely succumb to locally recurrent disease. Gene expression profiling
and modeling strongly support a critical role for inflammation in HNSCC initiation and progression. Immune
therapy holds promise for the treatment of HNSCC, as the immunotherapeutic agent nivolumab (anti-PD-1)
recently demonstrated clinical activity in a small percentage of patients with recurrent/metastatic HNSCC.
However, these findings suggest that HNSCC patients would be excellent candidates for novel immune
therapeutics that could target resistance to anti-PD-1. We have found that PI3Kγ in immune suppressive
Tumor Associated Macrophages (TAMs) promotes tumor immune suppression and resistance to checkpoint
inhibitors in mouse models of HNSCC. Genetic or pharmacological inactivation of PI3Kγ, but not of other PI3K
isoforms, repolarized TAMs toward a pro-inflammatory, anti-tumor phenotype and synergized with checkpoint
inhibitors to activate memory T cells and eradicate HNSCC tumors. Our studies indicate that PI3Kγ inhibitors,
such as the investigational agent IPI-549, may be valuable immune oncologic agents to treat and monitor
HNSCC patient outcomes. Our studies also identified a novel PI3Kγ-driven signature of immune suppression -
that predicts decreased survival in HNSCC patients. We propose to test the hypothesis that this PI3Kγ-
mediated signature of immune suppression can be used to monitor therapeutic responses to PI3Kγ inhibitors.
We will also test the hypothesis that therapeutic strategies that block PI3Kγ-mediated immune suppression will
synergize with T cell targeted therapeutics to improve outcomes in HNSCC patients. The specific aims of this
proposal are 1) To Identify the mechanisms by which PI3Kγ inhibitors synergize with anti-PD-1 to promote T
cell recruitment and activation in vivo, using mouse models of HPV+ and HPV- carcinogen-induced HNSCC, 2)
To determine the effect of the PI3Kγ inhibitor IPI-549 on tumor immune responses in patients with resectable
HNSCC, 3) To evaluate biomarkers of immune response in recurrent/metastatic HNSCC patients treated with
IPI-549 in combination with anti-PD-1.
摘要
迫切需要开发用于头颈部鳞状细胞癌(HNSCC)的新疗法。
在美国和世界上的其它国家,HPV-HPV相关的HNSCC的发病率正在迅速上升,
而烟草相关的HNSCC仍是一种侵袭性疾病,预后差,治疗有限
在全球范围内,HNSCC每年有超过600,000例病例,是癌症的主要原因
大多数HNSCC患者最初表现为局部或局部区域性,
这些患者大多数是晚期疾病,但这些患者大多死于局部复发性疾病。
和建模强烈支持炎症在HNSCC起始和进展中的关键作用。免疫
治疗HNSCC有希望,作为免疫抑制剂nivolumab(抗HNSCPD-1)
最近在一小部分复发性/转移性HNSCC患者中证实了临床活性。
然而,这些发现表明,HNSCC患者将是新的免疫治疗的极好候选者。
我们已经发现,PI 3 K γ在免疫抑制中起着重要的作用,
肿瘤相关巨噬细胞(TAMs)促进肿瘤免疫抑制和对检查点的抵抗
HNSCC小鼠模型中的抑制剂。PI 3 K γ的遗传或药理学失活,但其他PI 3 K
同种型,使TAM向促炎、抗肿瘤表型再极化,并与检查点协同作用
我们的研究表明,PI 3 K γ抑制剂,
如研究药物IPI-P549,可能是治疗和监测有价值的免疫肿瘤药物
我们的研究还发现了一种新的PI 3 K γ-κ B驱动的免疫抑制信号--
预测HNSCC患者生存率下降。我们建议检验这一假设,即PI 3 K γ-激酶
介导的免疫抑制信号可用于监测对PI 3 K γ抑制剂的治疗反应。
我们还将检验阻断PI 3 K γ-κ B介导的免疫抑制的治疗策略将导致免疫抑制的假设。
本发明的具体目的是与T细胞靶向治疗剂协同作用以改善HNSCC患者的结果。
我们的建议是:1)确定PI 3 K γ抑制剂与抗PD-L1协同作用促进T细胞凋亡的机制,
体内细胞募集和活化,使用HPV+和HPV-10致癌物诱导的HNSCC的小鼠模型,2)
为了确定PI 3 K γ抑制剂IPI-IL 549对可切除的肿瘤患者的肿瘤免疫应答的影响,
3)评估用以下药物治疗的复发性/转移性HNSCC患者中的免疫应答的生物标志物:
IPI-PD 549与抗PD-PD 1的组合。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(2)
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